Robust, Highly Luminescent Au13 Superatoms Protected by N-Heterocyclic Carbenes
Year of publication
2019
Authors
Narouz, Mina R.; Takano, Shinjiro; Lummis, Paul A.; Levchenko, Tetyana I.; Nazemi, Ali; Kaappa, Sami; Malola, Sami; Yousefalizadeh, Goonay; Calhoun, Larry A.; Stamplecoskie, Kevin G.; Häkkinen, Hannu; Tsukuda, Tatsuya; Crudden, Cathleen M.
Abstract
Gold superatom nanoclusters stabilized entirely by N-heterocyclic carbenes (NHCs) are reported. The reduction of well-defined NHC–Au–Cl complexes produces clusters com-prised of an icosahedral Au13 core surrounded by a symmetrical arrangement of 9 NHCs and 3 chlorides. X-ray crystallography shows that the clusters are characterized by multiple CH–π and π–π interactions, which rigidify the ligand and likely con-tribute to the exceptionally high photoluminescent quantum yields observed, up to 16.0 %, which is significantly greater than the most luminescent ligand-protected Au13 superatom cluster. Density functional theory analysis suggests that clus-ters are 8-electron superatoms with a wide HOMO-LUMO energy gap of 2 eV. Consistent with this, the clusters have high stability relative to all-phosphine clusters.
Show moreOrganizations and authors
Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Publisher
Volume
141
Issue
38
Pages
14997-15002
ISSN
Publication forum
Publication forum level
3
Open access
Open access in the publisher’s service
No
Self-archived
Yes
Other information
Fields of science
Physical sciences
Keywords
[object Object],[object Object]
Publication country
United States
Internationality of the publisher
International
Language
English
International co-publication
Yes
Co-publication with a company
No
DOI
10.1021/jacs.9b07854
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes